This is the MEW quoted in the manufacturer's standard specification documents and is the aircraft standard basic dry weight upon which all other standard specifications and aircraft performance are based by the manufacturer. The
Specification MEW includes the weight of: •
Airframe structure – primary and secondary structures (
fuselage,
wing, tail, control surfaces,
nacelles,
landing gear). •
Powerplant. •
Auxiliary power unit (APU). • Systems (instruments, navigation, hydraulics, pneumatics, fuel systems (
but not fuel itself), electrical system, electronics, fixed furnishings (
but not operator specific), air conditioning, anti-ice system, etc.). • Fixed equipment and services considered an integral part of the aircraft. • Fixed ballast (if present). • Closed system fluids (such as
hydraulic fluids). For small aircraft, the MEW may include unusable fuel and oil. The
Specification MEW excludes the weight of: • All fuel (both usable and unusable). • Potable water, anti-ice, and chemicals in toilets. • Engine oil and APU oil. • All specification items, selections, and installations which are non-basic (i.e. optional selections). • Customer specific selections, installations, and options. • Operator/operating items. • Removable equipment and services. • Payload. For small aircraft, the specification MEW is known as the
standard empty weight (or
standard weight empty). ==See also==